I think Demar is pretty aggressive...that's not the kind of dunk any guy does every night.....I could only think of 2 nastier dunks that I've seen during a game, off the top of my head (granted of course that VC has a few similarly nasty ones, but even with him, I can only think of one over Mutumbo, and one over Duncan, that were similarly sick):

The only real difference between this one and the Demars dunk, is Wade gets the extra foul shot for being Wade..

I think, also, the fact that not only did he knock Varejao down, but Varejao hit the basket support with his head...freakin best dunk ever...but yeah, Demar's I think is pretty close...if only some bonus embarrassing thing happened to Mozgov like falling over, or getting the ball in the face and having his nose bleed.